Advertised as "gold leaf" - but what material is it really?

[stoki]

TL;DR

need help in recognizing and sourcing this material

I've been importing this material from China for years. However, shipping is getting more and more expensive, slow and unreliable. It would be a great to have a local manufacturer/supplier but I don't even know what it is. It is advertised as "imitation gold leaf" but... Imitation gold leaf from European suppliers is produced the same way like real gold leaf only gold is replaced by cooper. This Chinese one, when touched, it doesn't feel like metal. Does anyone have an idea what material it is and how it is produced?

 

[TeethWhitener]

Try this:
https://en.m.wikipedia.org/wiki/Metallised_film

 

[stoki]

That's it. Thank you.